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English
11
13.0 pH calibration cont.
To calibrate the pH
Clean pH probe tip.
See section 24.0 (the pH probe does not
require cleaning before the rst use).
The calibration default is set at two point
calibration. If a three point calibration is
required:
a) Press ‘menu’.
b) Press ‘∨’ to nd ‘2/3 point cal’. Press ‘enter’.
c) Press ‘∨’ to select ‘3’. Press ‘enter’. When
‘saved’ is displayed on screen, three point
calibration is now available.
In separate plastic containers, prepare a
small amount of: fresh tap water, pH 7.0, pH
4.0 and/or pH 10.0 calibration solutions.
pH 7.0 calibration
a) Ensure the pH controller is plugged in.
b) Press and hold ‘cal’ for three seconds. ‘pH 7
Calibrate’ will be displayed.
c) Place the clean pH probe tip in the pH 7.0
calibration solution. Press ‘cal’.
d) Calibration is complete when all the ‘’s
on the screen become solid. The screen
will display ‘OK’ and the ‘pH 7’ indicator
will appear to indicate successful pH 7.0
calibration.
e) Now you can calibrate to pH 4.0 and/or pH
10.0
pH 4.0 and/or pH 10.0 calibration
a) Rinse the probe tip in fresh tap water,
shake off excess water. Place the clean
pH probe tip in either pH 4.0 or pH 10.0
calibration solution. Press ‘cal’.
b) Calibration is complete when all the ‘’s
on the screen become solid. The screen
will display ‘OK’ and the ‘pH 4’ or ‘pH 10’
indicator will appear to indicate successful
pH calibration.
c) If you require three point calibration, repeat
‘5a’ and ‘5b’ using the pH 4.0 or pH 10.0,
whichever solution was not used.
d) The pH controller is now calibrated, and
ready for use.
After pH calibration, the pH controller
reverts to ‘Monitor’ mode.
Change to ‘Control’ mode if required.
NOTE: If ‘Failed <e>’ is displayed on the screen during
calibration, see section 25.0 Troubleshooting.
1
2
3
4
5
6
press cal button
press cal button
successful
pH 7, 4 and pH 10
calibration
successful pH 7 calibration
ready for pH 4 or pH 10 calibration
pH 7.0
calibration
solution
pH 4.0 or
pH 10.0
calibration
solution
clean the pH probe
rinse in tap water
successful
pH 7 and pH 4
calibration
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